ICB2FL02G Datasheet, PDF (31/55 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

2^nd Generation FL-Controller for FL-Ballasts
Functional Description
2.7.1 Short Term PFC Bus Under Voltage
A short term PFC bus under voltage (Figure 26) is detected if the duration of the under voltage does
not exceed 800 ms (timer stays below t < 800ms see Figure 26). In that case, the PFC and inverter
drivers are immediately switched off and the controller is continuously monitoring the status of the bus
voltage in a latched power down mode (I_CC < 170 µA). If the signal at the LVS PIN exceeds 18µA and
the rated bus voltage is above 12.5% within the timer is below t < 800 ms, the controller restarts from
power up without preheating. The timer resets to 0 when entering the Run Mode.
Bus Voltage Drop for t < 800 ms
Restart without Preheating
V_BUSRated
100%
Interrupt for
t < 800 ms
75%
V_CC
16V
RUN Mode
Power Down
Mode
Pre Run
Run Mode
I_CC
Timer
< 6 mA +
I_QGate
< 160 µA
< 6 mA + I_QGate
t = 800ms
I_Preheating
V_Lamp
Figure 26 BUS Voltage Drop below 75% (rated Bus Voltage) for t < 800 ms during RUN Mode
Preliminary Datasheet
Page 31 of 55
ICB2FL02G
V1.2